61457200591 has 4 divisors (see below), whose sum is σ = 61457906952. Its totient is φ = 61456494232.

The previous prime is 61457200583. The next prime is 61457200621. The reversal of 61457200591 is 19500275416.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 61457200591 - 2³ = 61457200583 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61457200391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200740 + ... + 403993.

It is an arithmetic number, because the mean of its divisors is an integer number (15364476738).

Almost surely, 2^61457200591 is an apocalyptic number.

61457200591 is a deficient number, since it is larger than the sum of its proper divisors (706361).

61457200591 is a wasteful number, since it uses less digits than its factorization.

61457200591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706360.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 61457200591 in words is "sixty-one billion, four hundred fifty-seven million, two hundred thousand, five hundred ninety-one".